Sintra weather in December (Lisbon Region, Portugal)

Planning a trip to Sintra in December? Wondering if it's the right time to visit? Browse this page for a comprehensive overview of the weather conditions for that month.

In December, Sintra typically experiences moderate temperatures and moderate rainfall. Throughout the daytime, temperatures often hover around 16°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 12°C.

Sintra in December usually receives moderate rainfall, averaging around 90 mm for the month. When we look at the climate data from the last 30 years, we can expect around 14 days of rain.

The city usually sees around 162 hours of sunlight, indicating a moderately sunny period.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Sintra. June, July, August, September and October generally stand out with the best circumstances. While January, February, March and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Sintra climate page with graphs.

 

Sintra, monthly averages in December

Min TemperatureMin Temperature 12°C  
Max TemperatureMax Temperature 16°C  
Chance of RainChance of Rain 47%  
PrecipitationPrecipitation 90 mm  
Rainy daysRainy days 14 days  
HumidityHumidity 81% *  
SunshineSunshine 162 hours *  
Percentage SunshinePercentage Sunshine 55% *  
* Data from: Cascais, Portugal (11 KM, 7 Miles).

Where to go in Portugal in December

Find out more about the weather in Portugal in December and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Sintra in December?

For visitors traveling to Sintra, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in December.

Swimming
5/10
Cycling
6/10
Walking
6/10
Barbeque
6/10
Camping
8/10
Outdoor sports
9/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Sintra.

Our site offers climate and forecast data for every country in the world. Are you going to Portugal? On this website you can find historical weather averages for many cities in Portugal. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.